remove otlp_grpc_exporter_test link to gRPC::grpc++

Author: dbarker

exporters/otlp/CMakeLists.txt

@@ -321,7 +321,7 @@ if(BUILD_TESTING)
     add_executable(otlp_grpc_exporter_test test/otlp_grpc_exporter_test.cc)
     target_link_libraries(
       otlp_grpc_exporter_test ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT}
-      ${GMOCK_LIB} opentelemetry_exporter_otlp_grpc gRPC::grpc++)
+      ${GMOCK_LIB} opentelemetry_exporter_otlp_grpc)
     gtest_add_tests(
       TARGET otlp_grpc_exporter_test
       TEST_PREFIX exporter.otlp.